房子、星星、沙漠，赐予它们的美丽的是一些看不见的东西。

Optimists tend to interpret their troubles as transient, controllable, and specific to one situation. Pessimists, on the other hand, believe that their troubles last forever, undermine everything they do, and are uncontrollable.

经济与生态之间的平衡是现代林业的核心。

I say luck is when an opportunity comes along and you're prepared for it.

自然选择是一种产生极高程度不可能性的机制。